switch to single render loop

2 files changed, 82 insertions, 0 deletions

diff --git a/events/events.go b/events/events.go
new file mode 100644
index 0000000..6783703
--- /dev/null
+++ b/events/events.go
@@ -0,0 +1,43 @@
+package events
+
+type DeviceID int
+
+type MouseMotion struct {
+	Which  DeviceID
+	Dx, Dy float32
+	Delta  uint64
+}
+
+type MousePress struct {
+	Delta                                uint64
+	Key                                  uint8
+	Which                                DeviceID
+	JustPressed, JustReleased, IsPressed bool
+}
+
+type WindowChange struct {
+	Height, Width int32
+}
+
+type KeyPress struct {
+	Delta                                uint64
+	Key                                  string
+	Which                                DeviceID
+	JustPressed, JustReleased, IsPressed bool
+}
+
+type Event interface {
+	KeyPress | WindowChange | MousePress | MouseMotion
+}
+
+type Events []any
+
+func OfType[T Event](events ...any) []T {
+	var result []T
+	for _, e := range events {
+		if eT, ok := e.(T); ok {
+			result = append(result, eT)
+		}
+	}
+	return result
+}
diff --git a/events/poll.go b/events/poll.go
new file mode 100644
index 0000000..faa4151
--- /dev/null
+++ b/events/poll.go
@@ -0,0 +1,39 @@
+package events
+
+import (
+	"github.com/Zyko0/go-sdl3/sdl"
+)
+
+func Poll(delta uint64) ([]any, error) {
+	var evs []any
+	var event sdl.Event
+	for sdl.PollEvent(&event) {
+		switch event.Type {
+		case sdl.EVENT_QUIT:
+			return nil, sdl.EndLoop
+		case sdl.EVENT_MOUSE_MOTION:
+			ev := event.MouseMotionEvent()
+			evs = append(evs, MouseMotion{
+				Delta: delta,
+				Dy:    ev.Yrel,
+				Dx:    ev.Xrel,
+				Which: DeviceID(ev.Which),
+			})
+		case sdl.EVENT_MOUSE_BUTTON_DOWN, sdl.EVENT_MOUSE_BUTTON_UP:
+			ev := event.MouseButtonEvent()
+			evs = append(evs, MousePress{
+				Delta:     delta,
+				Key:       ev.Button,
+				Which:     DeviceID(ev.Which),
+				IsPressed: ev.Down,
+			})
+		case sdl.EVENT_WINDOW_RESIZED:
+			ev := event.WindowEvent()
+			evs = append(evs, WindowChange{
+				Height: ev.Data1,
+				Width:  ev.Data2,
+			})
+		}
+	}
+	return evs, nil
+}